A 34-year-old man presents with a penetrating left chest wound. Vital signs show BP 128/82, HR 92, RR 18, temp 37.2°C, SpO2 98%. He develops left-sided Horner syndrome and left arm weakness with loss of pain and temperature sensation on the right leg below T10. MRI reveals a left-sided spinal cord lesion at T1 without cord transection. He denies bowel/bladder dysfunction. Which spinal cord structure is most likely damaged?
- A)Right lateral corticospinal tract
- B)Central gray matter bilaterally
- C)Left lateral funiculus containing sympathetic fibers and spinothalamic tractGABARITO
- D)Left ventral corticospinal tract
- E)Right dorsal column (fasciculus gracilis)
Explicação
This patient demonstrates Brown-Séquard syndrome: ipsilateral motor weakness (left corticospinal tract) and Horner syndrome (left sympathetic tract in lateral funiculus), with contralateral pain/temperature loss (right spinothalamic tract crossing 1-2 segments... Ver explicação completa e trilha adaptativa →